how to use two inputs into one output

Projects Programming
1

im trying to control led using 4*4 keypad and via bluetooth i wrote tow separate codes for each i have problems combinding them please help me out combinding them as a program

two programs i wrote as below
for keypad

#include <Keypad.h>

const byte ROWS = 4; // Four rows
const byte COLS = 4; // Three columns

char keys[ROWS][COLS] = { // Define the Keymap
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};

byte rowPins[ROWS] = { 5, 4, 3, 2 };// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.

byte colPins[COLS] = { 9, 8, 7, 6 }; // Connect keypad COL0, COL1 and COL2 to these Arduino pins.

Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );// Create the Keypad

#define relay1 22
#define relay2 23
#define relay3 24
#define relay4 25
#define relay5 26
#define relay6 27
#define relay7 28
#define relay8 29

int state = 0;

void setup()
{
pinMode(relay1,OUTPUT);
pinMode(relay2,OUTPUT);
pinMode(relay3,OUTPUT);
pinMode(relay4,OUTPUT);
pinMode(relay5,OUTPUT);
pinMode(relay6,OUTPUT);
pinMode(relay7,OUTPUT);
pinMode(relay8,OUTPUT);

digitalWrite(relay1, HIGH);
digitalWrite(relay2, HIGH);
digitalWrite(relay3, HIGH);
digitalWrite(relay4, HIGH);
digitalWrite(relay5, HIGH);
digitalWrite(relay6, HIGH);
digitalWrite(relay7, HIGH);
digitalWrite(relay8, HIGH);

Serial.begin(9600);
}

void loop()
{
char key = kpd.getKey();
if(key) // Check for a valid key.
{
switch (key)
{
case '1':
digitalWrite(relay1, LOW);
break;
case 'A':
digitalWrite(relay1, HIGH);
break;

case '2':
digitalWrite(relay2, LOW);
break;

case '3':
digitalWrite(relay3, LOW);
break;

case '4':
digitalWrite(relay4, LOW);
break;
case 'B':
digitalWrite(relay4, HIGH);
digitalWrite(relay5, HIGH);
break;

case '5':
digitalWrite(relay5, LOW);
break;

case '6':
digitalWrite(relay6, LOW);
break;
case 'C':
digitalWrite(relay6, HIGH);
break;

case '7':
digitalWrite(relay7, LOW);
break;

case '8':
digitalWrite(relay8, LOW);
break;
case 'D':
digitalWrite(relay8, HIGH);
break;

case '9':
digitalWrite(relay6, LOW);
break;

case '0':
digitalWrite(relay8, LOW);
break;

case '*':
digitalWrite(relay1, HIGH);
digitalWrite(relay2, HIGH);
digitalWrite(relay3, HIGH);
digitalWrite(relay4, HIGH);
digitalWrite(relay5, HIGH);
digitalWrite(relay6, HIGH);
digitalWrite(relay7, HIGH);
digitalWrite(relay8, HIGH);
break;

case '#':
digitalWrite(relay1, HIGH);
delay(100);
digitalWrite(relay1, LOW);
digitalWrite(relay2, HIGH);
delay(100);
digitalWrite(relay2, LOW);
digitalWrite(relay3, HIGH);
delay(100);
digitalWrite(relay3, LOW);
digitalWrite(relay4, HIGH);
delay(100);
digitalWrite(relay4, LOW);
digitalWrite(relay5, HIGH);
delay(100);
digitalWrite(relay5, LOW);
digitalWrite(relay6, HIGH);
delay(100);
digitalWrite(relay6, LOW);
digitalWrite(relay7, HIGH);
delay(100);
digitalWrite(relay7, LOW);
digitalWrite(relay8, HIGH);
delay(100);
digitalWrite(relay8, LOW);
break;

default:
Serial.println(key);

}
}
}

code 2 for bluetooth

#define relay1 22
#define relay2 23
#define relay3 24
#define relay4 25
#define relay5 26
#define relay6 27
#define relay7 28
#define relay8 29

int state = 0;

void setup()
{
pinMode(relay1,OUTPUT);
pinMode(relay2,OUTPUT);
pinMode(relay3,OUTPUT);
pinMode(relay4,OUTPUT);
pinMode(relay5,OUTPUT);
pinMode(relay6,OUTPUT);
pinMode(relay7,OUTPUT);
pinMode(relay8,OUTPUT);

digitalWrite(relay1, HIGH);
digitalWrite(relay2, HIGH);
digitalWrite(relay3, HIGH);
digitalWrite(relay4, HIGH);
digitalWrite(relay5, HIGH);
digitalWrite(relay6, HIGH);
digitalWrite(relay7, HIGH);
digitalWrite(relay8, HIGH);

Serial.begin(9600);
}

void loop()
{
if(Serial.available() > 0){ // Checks whether data is comming from the serial port
state = Serial.read(); // Reads the data from the serial port
}
if(state == 'a')
digitalWrite(relay1, LOW);
else if(state == 'A')
digitalWrite(relay1, HIGH);

if(state == 'b')
digitalWrite(relay2, LOW);
else if(state == 'B')
digitalWrite(relay2, HIGH);

if(state == 'c')
digitalWrite(relay3, LOW);
else if(state == 'C')
digitalWrite(relay3, HIGH);

if(state == 'd')
digitalWrite(relay4, LOW);
else if(state == 'D')
digitalWrite(relay4, HIGH);

if(state == 'e')
digitalWrite(relay5, LOW);
else if(state == 'E')
digitalWrite(relay5, HIGH);

if(state == 'f')
digitalWrite(relay6, LOW);
else if(state == 'F')
digitalWrite(relay6, HIGH);

if(state == 'g')
digitalWrite(relay7, LOW);
else if(state == 'G')
digitalWrite(relay7, HIGH);

if(state == 'h')
digitalWrite(relay8, LOW);
else if(state == 'H')
digitalWrite(relay8, HIGH);

if(state == 'I')
digitalWrite(relay1, HIGH);
digitalWrite(relay2, HIGH);
digitalWrite(relay3, HIGH);
digitalWrite(relay4, HIGH);
digitalWrite(relay5, HIGH);
digitalWrite(relay6, HIGH);
digitalWrite(relay7, HIGH);
digitalWrite(relay8, HIGH);

}

2

All I can possibly say is... slow down. Don’t panic.

Separate your thoughts, and explain what & why your blocks of code are there.

What errors are you getting, and what are you expecting...

Please go back (before someone else responds), and re-post your question using </> code tags and a bit more care expressing your problem.

3

Why is your one code using if / else and the other code uses switch / case?

My idea is that regardless of the source of the character, you store that in a variable. You're using two variables, key and state; you can make that one variable (e.g. called cmd) if you don't care where it comes from. Next you use that variable to determine what to do.